National Baby Making Day is reportedly the best time to get frisky (Image: PA Photo/Thinkstockphotos)

When is National Baby Making Day?

The Channel Mum website surveyed 2,139 couples and most agreed that January 2 is the best day to get frisky, as 'the drinking and partying is over' and couples get some rare peace and quiet before heading back to work.

Reportedly, the most common time to get it on is 10.36pm, with 71 per cent having sex at this time while presumably keeping an eagle eye on the bedside clock.

All this synchronised activity means the UK's most commonly shared birthday is September 26, about 38 weeks after National Baby Making Day.

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Why does the festive season make people amorous?

Some 23 per cent want a Christmas-conceived baby, followed by 33 per cent who try to conceive on Christmas Eve, while a further 34 per cent will try for a baby on New Year's Eve.

New Year's Eve is also the best night to have sex 'just for fun', with 70 per cent of couples bounding into bed for the sake of auld lang syne.

Most reckon they make love more often over Christmas - 73 per cent claimed this was because they had more time together, while 48 per cent were just in a jolly Christmas mood.

Another 28 per cent said the festive spirit made them feel closer to their partner but 36 per cent admitted they had more sex as they were 'drinking more'.

Some 20 per cent got swept up in the festive feeling and decided to try for a baby, while a starry-eyed 16 per cent wanted to fall pregnant as 'the best Christmas present ever'.

However, the most popular reason for a Christmas-conceived baby is so it'd be born in September, making it the eldest in the school year, with 27 per cent of mums and dads claiming this was important to them.

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What's the most popular day to find out you're pregnant?

More women find out they are pregnant on January 17 (two weeks after National Baby Making Day) than at any other time of year.

Experts reckon more than 10,000 women nervously take pregnancy tests on that date so they can start planning for a new arrival.

Channel Mum also noticed 'pregnancy-test addiction', with women taking an average of six different pregnancy tests to make sure they really are expecting.

A startling 62 per cent carry on taking tests, spending an average of £30, despite already having a positive result.

Seven per cent of mums-to-be take 10 tests while one in 20 admit to checking 16 times or more before they finally accept they are pregnant.

The Channel Mum study even found one in 12 are so hooked on checking for the two blue lines that they keep taking tests up until their 12-week scan.

Forty per cent of couples trying to conceive have sex every day (Image: PA Photo/Thinkstockphotos)

How long do mums wait to announce their pregnancies?

Modern mums aren't waiting until the three-month mark to announce their pregnancies, with just 26 per cent holding out until after their scan to share the news.

Instead, one third choose to tell family and friends as soon as they discover they are expecting, with more than half announcing their pregnancy by the seven-week stage, despite medical experts advising the risk of miscarriage remains high.

Rather than telling people in person, three in five reveal their happy news on social media, with 45 per cent going a step further and posting their scan picture.

This compares to the 53 per cent who still tell their loved ones in person, and one in five who rock it old-school and share the news in a telephone call.

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What does the NHS advise?

If you really don't fancy getting your nose pierced, the NHS has some of your actual science-based advice for couples.

1. Have sex within a day or so of ovulation (when your ovaries are releasing an egg). This usually happens about 14 days after the first day of your last period.

2. Quit or reduce smoking and drinking. Smoking may reduce fertility in women, including passive smoking. Your partner should drink no more than 14 units of alcohol a week, spread evenly over three days or more. Drinking alcohol excessively can affect the quality of his sperm.

3. Being overweight or underweight can affect your chances of conceiving. Ensure your weight is 'healthy' with a body mass index (BMI) between 20 and 25. Women whose BMI is more than 30 or under 19 may have problems conceiving. If your partner's BMI is more than 30, his fertility is likely to be lower than normal.

For more information on increasing your chances of conceiving, visit the NHS website.